Donald Trump continues to lead the Republican presidential contest, not just in early contests states like Iowa and New Hampshire, but in the key swing states of Florida, Ohio, and Pennsylvania.

A new Quinnipiac University Poll illustrates Trump’s leads in those latter three states, two of which are homes to Republican opponents Jeb Bush, Marco Rubio, and John Kasich.

“Those who were waiting for Donald Trump’s campaign to collapse will need to wait longer, at least in the three key states of Ohio, Florida and Pennsylvania,” said Peter A. Brown, assistant director of the Quinnipiac University Poll.

In Florida, Trump leads with 28%, followed by retired neurosurgeon Ben Carson with 16%. Rubio, a U.S. senator from the Sunshine State, is third at 14%. Bush, a former governor of Florida, is fourth at 12%, followed by businesswoman Carly Fiorina (7%) and Texas Sen. Ted Cruz (6%).

The Quinnipiac Poll in Ohio puts Trump first at 23%, with Carson second at 18%. Kasich, the sitting governor of Ohio, is third at 13%, followed by Cruz (11%), Fiorina (10%), Rubio (7%), and Bush (4%).

In Pennsylvania, Quinnipiac has Trump at 23%, Carson at 17%, and Rubio at 12%, followed by Fiorina (8%), Cruz (6%), and New Jersey Gov. Chris Christie (5%). Bush and former Arkansas governor Mike Huckabee are both at 4%.

In analyzing the poll, Quinnipiac’s Brown noted that Fiorina and Carson — “the other two outsider candidates in the GOP race — also “seem to be making progress. But Bush, Sen. Rand Paul of Kentucky, former Arkansas Gov. Mike Huckabee and Sen. Ted Cruz of Texas seem to be treading water.”

Ben Carson leading Clinton, Biden and Sanders

The polls tell an interesting story on the Democratic side. Hillary Clinton is still leading the Democratic primary in three key swing states — Florida, Ohio, and Pennsylvania — but a new poll suggests she may have more to worry about than whether Vice President Joe Biden enters the race: Neurosurgeon Ben Carson could potentially pose a threat to the entire Democratic field.

If the election were held today and Carson were the Republican nominee, he would beat Clinton, Biden and Sen. Bernie Sanders in the battleground states of Ohio and Pennsylvania and also best the Vermont independent in Florida, according to a new Quinnipiac poll. No president has won the general election since 1960 without carrying two out of those three swing states.

In Ohio, Carson would defeat Biden by 4 percentage points (46 percent to 42 percent), Clinton by 9 points (49 percent to 40 percent) and Sanders by 12 points (48 percent to 36 percent), according to the poll. In Pennsylvania, the retired neurosurgeon would beat Clinton by 9 points (49 percent to 40 percent) and Sanders by 10 points (47 percent to 37 percent). And while Biden, who was born in Pennsylvania, is often called the state’s third senator, Carson would best him by 5 points there, 47 percent to 42 percent, according to the poll. In Florida, Carson would defeat Sanders 46 percent to 40 percent, but trails Biden by a margin of 45 percent to 42 percent, and Clinton by 45 to 42 percent.

The poll is the latest evidence that the political outsider is on an upswing, at least for now. Carson enjoyed a rise in the polls following the first Republican primary debate in August and raised $20 million during the third quarter. His primary numbers are not quite as encouraging. He still trails Donald Trump by a margin of 28 percent to 16 percent in Florida, by 23 percent to 18 percent in Ohio, and by 23 percent to 17 percent in Pennsylvania, but is the stronger of the two men against the top Democrats.

“Trump, despite his strong showing in mock Republican primaries, fares worst among the GOP candidates matched against the three Democratic aspirants — giving some credence to pundits who say the billionaire could be every Democrats’ favorite GOP nominee.” Peter A. Brown, assistant director of the Quinnipiac University poll, said in a statement.

The poll also shows more good news for Biden, who has yet to announce whether he will mount a campaign. While Clinton would lose to former Florida Gov. Jeb Bush (43 percent to his 44 percent) and Sen. Marco Rubio (44 percent to his 45 percent) in Florida if the election were held today, Biden would defeat both Republicans by 3 percentage points, according to the poll. In Ohio and Pennsylvania, Biden would beat Bush, Rubio, and former Hewlett-Packard CEO Carly Fiorina while Clinton trails all three.

“When we get past the playoffs to the World Series, the general election face-off, Biden does better against leading Republicans than does Clinton or Sanders,” Brown said.

The swing state poll was conducted from Sept. 25 to Oct. 5. The Florida portion surveyed 1,173 voters and has a margin of error of plus or minus 2.9 percent. In Ohio, Qunnipiac questioned 1.180 voters and the poll had a margin of error of plus or minus 2.9 percent. In Pennsylvania, 1,049 voters were surveyed, and the poll had a margin of plus or minus 3 percent.